Dna mutations dating migrations lesson
This rejection reflected the prevailing view that our large brain had evolved while the skeleton was still ape-like, and Dubois' suggestion that the reverse was true was sidelined.The "large brain first" view received further support when the Piltdown fossils were presented to the world.
By this stage the apes had developed a thick coating of enamel on their teeth, which enabled them to eat the harder foods (such as nuts and tough-coated seeds) that weren't available to (in Asia).
More recent Ardepithecus ramidus remains are dated at 4.4 million years.
That all these species existed so close to the origin of hominids suggests that even then our family tree could be described as bushy, rather than having the single linear progression from species to species that is so often presented in images of human evolution.
Now we know, through a combination of new fossil finds and molecular biology, that humans and chimpanzees diverged as little as 7 million years ago, and that our own lineage is "bushy", with many different species in existence at the same time.
Our view of our evolutionary past has changed as social attitudes have changed.
While we now know that they are fraudulent, at the time (1911) they seemed to demonstrate quite clearly that early humans had a modern was the reverse of a movement that occurred in the late Miocene, when the ancestors of the African apes migrated from Eurasia into Africa.